5 blade vs 7 blade clutch fan
Just thought I’d update this thread since I started it.
I ended up using the 7 blade fan shown in my original post, with the MP viscous clutch, on my ‘74 W200, original radiator and shroud. It’s a rebuilt 360, 10.5:1 compression with a little baby cam not worth mentioning. I have a Stewart Components 180* thermostat and I tell ya, the sob does not get any hotter than 180.
I’m driving the truck right now in 90 degree weather all over town, it stays at 180.